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de4dot 2012-04-13 01:43:50 +02:00
parent a459bc107c
commit 0df7b918ea
1 changed files with 23 additions and 89 deletions
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112
de4dot.code/deobfuscators/MaxtoCode/FileDecrypter.cs
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@ -325,107 +325,41 @@ namespace de4dot.code.deobfuscators.MaxtoCode {
byte[] decrypt(int type, byte[] encrypted);
}
class DecrypterV1 : IDecrypter {
class Decrypter : IDecrypter {
MethodInfos methodInfos;
int[] typeToMethod;
public DecrypterV1(MethodInfos methodInfos) {
public Decrypter(MethodInfos methodInfos, int[] typeToMethod) {
this.methodInfos = methodInfos;
this.typeToMethod = typeToMethod;
}
public byte[] decrypt(int type, byte[] encrypted) {
switch (type) {
case 1: return methodInfos.decrypt1(encrypted);
case 2: return methodInfos.decrypt4(encrypted);
case 3: return methodInfos.decrypt2(encrypted);
case 4: return methodInfos.decrypt3(encrypted);
case 5: return methodInfos.decrypt5(encrypted);
case 6: return methodInfos.decrypt6(encrypted);
case 7: return methodInfos.decrypt7(encrypted);
default: throw new ApplicationException(string.Format("Invalid encryption type: {0:X2}", type));
}
}
}
class DecrypterV2 : IDecrypter {
MethodInfos methodInfos;
public DecrypterV2(MethodInfos methodInfos) {
this.methodInfos = methodInfos;
}
public byte[] decrypt(int type, byte[] encrypted) {
switch (type) {
case 1: return methodInfos.decrypt3(encrypted);
case 2: return methodInfos.decrypt2(encrypted);
case 3: return methodInfos.decrypt1(encrypted);
case 4: return methodInfos.decrypt4(encrypted);
case 5: return methodInfos.decrypt5(encrypted);
case 6: return methodInfos.decrypt6(encrypted);
case 7: return methodInfos.decrypt7(encrypted);
default: throw new ApplicationException(string.Format("Invalid encryption type: {0:X2}", type));
}
}
}
class DecrypterV3 : IDecrypter {
MethodInfos methodInfos;
public DecrypterV3(MethodInfos methodInfos) {
this.methodInfos = methodInfos;
}
public byte[] decrypt(int type, byte[] encrypted) {
switch (type) {
case 1: return methodInfos.decrypt1(encrypted);
case 2: return methodInfos.decrypt2(encrypted);
case 3: return methodInfos.decrypt3(encrypted);
case 4: return methodInfos.decrypt4(encrypted);
case 5: return methodInfos.decrypt5(encrypted);
case 6: return methodInfos.decrypt6(encrypted);
case 7: return methodInfos.decrypt7(encrypted);
default: throw new ApplicationException(string.Format("Invalid encryption type: {0:X2}", type));
}
}
}
class DecrypterV4 : IDecrypter {
MethodInfos methodInfos;
public DecrypterV4(MethodInfos methodInfos) {
this.methodInfos = methodInfos;
}
public byte[] decrypt(int type, byte[] encrypted) {
switch (type) {
case 1: return methodInfos.decrypt2(encrypted);
case 2: return methodInfos.decrypt1(encrypted);
case 3: return methodInfos.decrypt3(encrypted);
case 4: return methodInfos.decrypt4(encrypted);
case 5: return methodInfos.decrypt5(encrypted);
case 6: return methodInfos.decrypt6(encrypted);
case 7: return methodInfos.decrypt7(encrypted);
default: throw new ApplicationException(string.Format("Invalid encryption type: {0:X2}", type));
if (0 <= type && type < typeToMethod.Length) {
switch (typeToMethod[type]) {
case 1: return methodInfos.decrypt1(encrypted);
case 2: return methodInfos.decrypt2(encrypted);
case 3: return methodInfos.decrypt3(encrypted);
case 4: return methodInfos.decrypt4(encrypted);
case 5: return methodInfos.decrypt5(encrypted);
case 6: return methodInfos.decrypt6(encrypted);
case 7: return methodInfos.decrypt7(encrypted);
}
}
throw new ApplicationException(string.Format("Invalid encryption type: {0:X2}", type));
}
}
static readonly int[] typeToTypesV1 = new int[] { -1, 1, 4, 2, 3, 5, 6, 7 };
static readonly int[] typeToTypesV2 = new int[] { -1, 3, 2, 1, 4, 5, 6, 7 };
static readonly int[] typeToTypesV3 = new int[] { -1, 1, 2, 3, 4, 5, 6, 7 };
static readonly int[] typeToTypesV4 = new int[] { -1, 2, 1, 3, 4, 5, 6, 7 };
void initializeDecrypter() {
switch (getVersion()) {
case EncryptionVersion.V1:
decrypter = new DecrypterV1(this);
break;
case EncryptionVersion.V2:
decrypter = new DecrypterV2(this);
break;
case EncryptionVersion.V3:
decrypter = new DecrypterV3(this);
break;
case EncryptionVersion.V4:
decrypter = new DecrypterV4(this);
break;
case EncryptionVersion.V1: decrypter = new Decrypter(this, typeToTypesV1); break;
case EncryptionVersion.V2: decrypter = new Decrypter(this, typeToTypesV2); break;
case EncryptionVersion.V3: decrypter = new Decrypter(this, typeToTypesV3); break;
case EncryptionVersion.V4: decrypter = new Decrypter(this, typeToTypesV4); break;
case EncryptionVersion.Unknown:
default: